<!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
  <title></title>
  <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" />
  <style type="text/css">
    div{
      font-size: 50px;
      animation: change 3s infinite ;
    }
    @keyframes change {
      0%{
        color: red;
      }
      50%{
        color: green;
      }
      100%{
        color: blue;
      }
    }
  </style>
</head>

<body>
  
  <div>123</div>
  <script type="text/javascript">

  </script>
  </script>


</body>

</html>